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6b3351792c
For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie
and COFF, but not for Mach-O. This nuance causes unneeded binary format differences.
This patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `
if there is an explicit linkage.
* Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar.
* Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
21 lines
754 B
C++
21 lines
754 B
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin -O1 -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s
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// Test TBAA metadata generated by front-end (vector types are always treated as mayalias).
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typedef float __m128 __attribute__ ((__vector_size__ (16)));
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struct A {
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__m128 a, b;
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};
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void foo(A *a, __m128 v) {
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// CHECK-LABEL: define{{.*}} void @_Z3fooP1ADv4_f
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a->a = v;
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// CHECK: store <4 x float> %v, <4 x float>* %{{.*}}, align 16, !tbaa [[TAG_char:!.*]]
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// CHECK: store <4 x float> %{{.*}}, <4 x float>* %{{.*}}, align 16, !tbaa [[TAG_char]]
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}
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// CHECK: [[TYPE_char:!.*]] = !{!"omnipotent char", [[TAG_cxx_tbaa:!.*]],
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// CHECK: [[TAG_cxx_tbaa]] = !{!"Simple C++ TBAA"}
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// CHECK: [[TAG_char]] = !{[[TYPE_char]], [[TYPE_char]], i64 0}
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